Fuses & Circuit Breakers

Although they work in different ways, fuses and circuit breakers broadly have the same purpose; to protect electrical appliances and electrical circuits from short circuits, and excessive current (called overcurrent or overload).

Fuses

Fuses are relatively low cost electrical safety devices. If too much current enters the circuit, the fuse will burn out (sometimes called blowing out). When the fuse blows out it breaks the circuit. This protects the attached devices and allows you to touch devices without being electrocuted. When the fuse blows, it must be replaced before using the device or appliance again.

Circuit breakers

Circuit breakers work in a similar way to fuses, but they are resettable. Once a fault is detected (this is typically a short circuit or an excessive amount of current flowing through the circuit) the circuit breaker will interrupt the flow of current. When the circuit breaker trips, it's simply a case of flicking a switch to reset the circuit breaker. As soon as you've reset the circuit breaker, it is ready to use again.

Circuit Breakers
Circuit Breakers
Earth & Lightning Protection
Earth & Lightning Protection
Fuse Holders & Accessories
Fuse Holders & Accessories
Fuses
Fuses

34912 Products showing for Fuses & Circuit Breakers

54 of 999+
In Stock
ABB SN201 MCB, 1+N, 4A Curve C, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 186-3483
  • Mfr. Part No. 2CSS255102R0044 SN201 C4-L
Each
$140.82(exc. VAT)
In Stock
Schneider Electric Resi9 R9PF MCB, 3P, 16A, 400V AC, 3000 A Breaking Capacity
  • RS Stock No. 276-8967
  • Mfr. Part No. R9PFC716
Each
$203.41(exc. VAT)
Temporarily out of stock
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX160/250 Circuit Breakers
  • RS Stock No. 260-7722
  • Mfr. Part No. C1642G160
Each
$2,006.40(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 20A Curve D, 100 → 133V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3477
  • Mfr. Part No. A9F55120
Each
$74.04(exc. VAT)
In Stock
Schneider Electric 100V ac Shunt Trip Circuit Trip for use with IC60, IID, ISW-NA
  • RS Stock No. 734-9021
  • Mfr. Part No. A9A26946
Each
$191.24(exc. VAT)
Temporarily out of stock
HENSEL ENYMOD Distribution Board
  • RS Stock No. 117-740
  • Mfr. Part No. FP MP 20
Each
$88.12(exc. VAT)
Limited stock
SIBA 500mA FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 736-1416
  • Mfr. Part No. 70-172-40/0.5A
Each
$13.56(exc. VAT)
In Stock
RS PRO 100mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 610-9579
Each (In a Pack of 10)
$1.514(exc. VAT)
In Stock
Mersen 16A FF Cartridge Fuse, 14 x 51mm
  • RS Stock No. 136-0573
  • Mfr. Part No. E1017202 / FR14GR69V16
Each
$37.15(exc. VAT)
Being discontinued
RS PRO 30A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 177-8107
Each (In a Pack of 50)
$0.662(exc. VAT)
In Stock
Eaton 125A Bolted Tag Fuse, 18 x 56mm, 150 V dc, 240 V ac, 41mm
  • RS Stock No. 182-1771
  • Mfr. Part No. 125LET
Each
$50.88(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 1P, 63A Curve C, 100 → 133V AC, 12 → 48V DC, 6 kA Breaking Capacity
  • RS Stock No. 790-8879
  • Mfr. Part No. A9F44163
Each
$15.20(exc. VAT)
Temporarily out of stock
Schneider Electric Acti9 3, 3+N Phase Distribution Board, 16 Way, 250 A
  • RS Stock No. 336-622
  • Mfr. Part No. SEA9BN16E
Each
$1,253.42(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON Circuit breaker 3P 100A, DIN Rail Mount
  • RS Stock No. 224-7911
  • Mfr. Part No. 3VA2010-7HL32-0AA0
Each
$1,525.82(exc. VAT)
Limited stock
Limitor Thermal Fuse +142°C 10 A/15 A, 250V ac
  • RS Stock No. 797-6061
  • Mfr. Part No. SF 139 R
Each (In a Pack of 10)
$2.267(exc. VAT)
In Stock
Better World
Schneider Electric 125A Rail Mount Fuse Holder for 22 x 58mm Fuse, 3P+N, 690V ac
  • RS Stock No. 482-465
  • Mfr. Part No. DF223NC
Each
$172.43(exc. VAT)
In Stock
B&R Enclosures 2 Way Plastic Consumer Unit, IP30 LCP
  • RS Stock No. 885-2543
  • Mfr. Part No. LCP02
Each
$22.44(exc. VAT)
In Stock
Littelfuse SMD Non Resettable Fuse 3.15A, 125V
  • RS Stock No. 738-2902
  • Mfr. Part No. 04513.15MRL
Each (In a Pack of 10)
$1.704(exc. VAT)
Temporarily out of stock
Mersen 4A Slow-Blow Ceramic Cartridge Fuse, 8.5 x 31.5mm
  • RS Stock No. 247-2893
  • Mfr. Part No. S219229
1 Box of 10
$34.34(exc. VAT)
In Stock
Legrand 6.3A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 266-3069
  • Mfr. Part No. 0 102 63
1 Box of 10
$41.38(exc. VAT)
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